Portable Self-priming Pump

ABSTRACT

This invention discloses a portable self-priming pump, which includes a pump body, a pump cover, a rubber impeller with a metal insert, and a metal shaft. An inner cavity formed by the pump body, in the side wall of the pump body provided with a water inlet and a water outlet which are communicated with the inner cavity, the water inlet and the water outlet are in the same plane and the angle formed by their axes is 20°-160°, the inner cavity is designed with a cam-shaped structure and the rubber impeller with a metal insert is placed in the inner cavity. The whole structure of the portable self-priming pump is simplified, so it&#39;s convenient for installation, manufacture and disassembly and maintenance, and it is with a small sized volume which occupies small space and is suitable for operation in narrow space, and it has high practicality accordingly.

CROSS REFERENCE TO RELATED APPLICATIONS

The present application is a Continuation Application of PCT Application No. PCT/CN2018/076280 filed on Feb. 11, 2018, which claims the benefit of Chinese Patent Application No. 201820167878.8 filed on Jan. 31, 2018. All the above are hereby incorporated by reference.

TECHNICAL FIELD

The present invention relates to a portable self-priming pump which belongs to the technical field of self-priming pump.

BACKGROUND OF THE INVENTION

Pumps are roughly divided into two categories, one is the submersible pumps, and the other is the ground self-priming pumps, the working space in which the submersible pump is placed needs to be large and it cannot be put in a normal narrow space, at present, the ground self-priming pump needs to be installed fixedly, and the pump is larger in volume and more complex in installation, it is inconvenient and uncompleted when using these two types of pump to pump a small amount remaining liquid at home in small spaces such as sinks, fish tanks and oil tanks, so the applicability is not good.

SUMMARY OF THE INVENTION

The technical problem to be solved by the present invention is to provide a portable self-priming pump with simple structure and effectively applicable for small spaces.

In order to solve the above technical problem, the present invention realizes it by supplying the following technical solution:

A portable self-priming pump, which includes a pump body, a pump cover, a rubber impeller with a metal insert and a metal shaft. An inner cavity formed by the pump body, in the side wall of the pump body provided with a water inlet and a water outlet which are communicated with the inner cavity, the water inlet and the water outlet are in the same plane and the angle formed between their axel is 20°-160°, and the outer ends of the water inlet and the water outlet are provided with connection thread for water hose, the inner cavity is designed with a cam-shaped structure and the rubber impeller with a metal insert is placed in the inner cavity, the rubber impeller with a metal insert is installed in one end of the metal shaft, and the other end of the metal shaft passes through the shaft hole in the middle of one end surface of the pump body and extends to the outside of the pump body, and the other end of the pump body is provided with a pump cover that is covered at the end, an oil seal and a pressure sleeve arranged on the metal shaft are disposed between the shaft hole and the metal shaft, and an oil seal chamber is arranged on the side of the central shaft hole which is near to the inner cavity body, the oil seal is installed outside of the pressure sleeve and is placed in the oil seal chamber, a recessed groove connected to the oil seal chamber is arranged between the water inlet and the water outlet of the pump body.

Preferably, a sealing groove is arranged on the outer edge of the inner cavity body of the pump body, and an O ring is placed in the sealing groove and it is pressed tightly by the pump cover onto the pump body at the edge of the inner cavity.

Preferably, the angle formed between the water inlet axis and the water outlet axis is set to 50°-130°.

Preferably, the outer ends of the water inlet and the water outlet are provided with connection thread for water hose.

Preferably, the pump body surface which is in connection to the pump cover is provided with a plurality of thread holes, the pump cover is provided with a plurality of through holes which are matched with the thread holes on the pump body, the pump cover and the pump body are connected and tighten by screws going through the thread holes on the pump body and the through-holes on the pump cover.

Preferably, the free end of the metal shaft is designed as a polygon connection head.

Comparison with the prior art, a portable self-priming pump of the present invention has the following advantages: it designed in simplified structure, it is convenient for installation, manufacture and disassembly and maintenance, short priming time, high efficiency, and it has a small volume structure which occupies small space and it is suitable for operation in narrow spaces, and it has high practicality suitable for promotion.

BRIEF DESCRIPTION OF THE FIGURES

The invention is further illustrated with the following drawings:

FIG. 1 is a schematic view of the explosion structure of the present invention;

FIG. 2 is a side cross-section structural schematic view of the present invention;

FIG. 3 is a schematic structural view of the pump body of the present invention.

DETAILED DESCRIPTION

The following is clearly and completely describes of the technical solutions in the embodiments of the present invention. Apparently, the described embodiments are merely some but not all embodiments of the present invention. All other embodiments obtained by a person who is skilled in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention:

As shown in FIG. 1 and FIG. 2, a portable self-priming pump, which includes the pump body 1, the pump cover 2, the rubber impeller with a metal insert 3 and a metal shaft 4, the rubber impeller with a metal insert An inner cavity 5 formed by the pump body 1, in the side wall of the pump body 1 provided with a water inlet 6 and a water outlet 7 which are communicated with the inner cavity 5, the water inlet and the water outlet are in the same plane and the angle formed between their axel is 20°-160°, preferably the angle is set to 50°-130°. And the outer ends of the water inlet and the water outlet are provided with connection thread to connect water hose easily. In practical applications, after adding water in the self-priming pump for use in the first time, due to the angle designed between the water inlet and the water outlet, a small amount of water will store at the junction area therebetween after the first use, therefore, the next use does not need to add water, which improves the efficiency of self-priming.

The inner cavity body is designed as a cam-shaped structure and the rubber impeller with a metal insert is placed in the inner cavity, when the rubber impeller with a metal insert rotates in the inner cavity, the flexible impeller vanes will bend and deform, and the cavity volume between each vane will change while bending and deforming, therefore, sucks and expels water effectively and rapidly to realize self-priming process.

The rubber impeller with a metal insert is installed in one end of the metal shaft, and the other end of the metal shaft passes through the shaft hole which disposed in the central part of one end surface of the pump body and extends to the outside of the pump body, in the embodiment of this invention, in order to improve the sealing effect between the metal shaft and the pump body, an oil seal 8 and a pressure sleeve 9 are installed on the metal shaft between the shaft hole and the metal shaft. The oil sealing chamber 14 is arranged on the side of the central shaft hole which is near to the inner cavity body, and the oil seal is installed outside of the pressure sleeve and is placed in the oil seal chamber, specifically, the shaft hole is designed as a step hole, and the part of the hole which is adjacent to the inner cavity body is a large hole, that is the said oil sealing chamber. The oil seal is installed on the metal shaft and placed in the oil sealing chamber. The pressure sleeve is designed as T-shaped structure with a through hole in the central for passing through the metal shaft, and the pressure sleeve is inserted in the ring groove of the oil seal, thus effectively improved the sealing effect of the pump body and avoiding leakage.

Further, as shown in FIG. 3, a recessed groove 15 connected to the oil seal chamber 14 is arranged between the water inlet and the water outlet of the pump body, and the groove is concave on the side wall of the inner cavity body, part of the flow in the inner cavity will enter the recessed groove and then enter the oil sealing chamber, therefore, improve the lubrication and cooling effect of oil seal.

The other end of the pump body is provided with a pump cover which covers at the end of the pump body, and then the inner cavity of the pump body forms a complete and sealed self-priming cavity. In order to improve the sealing effect of the self-priming cavity, the outer edge of the inner cavity body is provided with a sealing groove 11, the sealing groove is provided with an O ring 12, and the O ring is pressed tightly by the pump cover onto the pump body at the edge of the inner cavity.

In addition, in order to improve the stability of the overall structure and to facilitate disassembly and maintenance, the pump body surface which is in connection to the pump cover is provided with a plurality of threaded holes 13, the pump cover is provided with a plurality of through holes which are matched with the thread holes on the pump body, the pump cover and the pump body are connected and tighten by screws going through the thread holes on the pump body and the through-holes on the pump cover.

In practical applications, the free end of the metal shaft can be designed as a polygon end, so that in practical use, it can directly connect to an electric pistol drill or other small, portable devices with a polygon electric connection head, which means that these portable devices can be connected to the polygon end of the metal shaft and drive the metal shaft to rotate, that is to provide power for the self-priming pump, so it is convenient to use.

The portable self-priming pump is designed in simplified structure, it is convenient for installation, manufacture and disassembly and maintenance, short priming time, high efficiency and it has a small overall structure which occupies small space and is suitable for narrow spaces operation, and it has high practicality.

It should be emphasized that foregoing descriptions are merely embodiments of the present invention, and therefore do not mean to limit the scope of the present invention. Any simple modification, equivalent change and modification of the above embodiment based on the technical substance of the invention shall be covered within the scope of protection of the present invention. 

What is claimed is:
 1. A portable self-priming pump, characterized by comprising a pump body, a pump cover, a rubber impeller with a metal insert, and a metal shaft, an inner cavity formed by the pump body, in the side wall of the pump body provided with a water inlet and a water outlet which are communicated with the inner cavity, the water inlet and the water outlet are in the same plane and the angle between their axes is set to 20°-160°, the inner cavity is designed with a cam-shaped structure and the rubber impeller with a metal insert is placed in the inner cavity, the rubber impeller with a metal insert is installed in one end of the metal shaft, and the other end of the metal shaft passes through the shaft hole in the central part of one end surface of the pump body and extends to the outside of the pump body, and the other end of the pump body is provided with a pump cover that is covered at the end, between the shaft hole and the metal shaft, an oil seal and a pressure sleeve are arranged on the metal shaft, and an oil seal chamber is arranged on the side of the central shaft hole which is near to the inner cavity body, the oil seal is installed outside of the pressure sleeve and is placed in the oil seal chamber, a recessed groove connected to the oil seal chamber is arranged between the water inlet and the water outlet of the pump body.
 2. The portable self-priming pump according to claim 1, characterized in that a sealing groove is arranged on the outer edge of the inner cavity body of the pump body, and an O ring is placed in the sealing groove and it is pressed tightly by the pump cover onto the pump body at the edge of the inner cavity.
 3. The portable self-priming pump according to claim 1, characterized in that the angle formed between the water inlet axis and the water outlet axis is set to 50°-130°.
 4. The portable self-priming pump according to claim 1, characterized in that the outer ends of the water inlet and the water outlet are provided with connection thread for water hose.
 5. The portable self-priming pump according to claim 1, characterized in that the pump body surface which is in connection to the pump cover is provided with a plurality of thread holes, the pump cover is provided with a plurality of through-holes which are matched with the thread holes on the pump body, the pump cover and the pump body are connected and tighten by screws going through the thread holes on the pump body and the through-holes on the pump cover.
 6. The portable self-priming pump according to claim 1, characterized in that the free end of the metal shaft is designed as a polygon connection head. 